Metal-tube-extruding machine.



L. E. HOOKER. METAL TUBE EXTRUDING MACHINE.

a APPLICATION FILED MAR. 27, I912. w m

Patented Aug. 29, 1916.

2 SHEETS-SHEET 2.

I I w MM Q/viimeo LESLIE E. HOOKER, 0F BARRINGTON, RHODE ISLAND.

METAL-TUBE-EXTBUDING MACHINE.

Specification of Letters Patent.

Patented Aug. 22, 1916.

Application filed March 217, 1912. Serial No. 686,598.

To all whom it may concern:

Be it known that I, LESLIE E. HOOKER, a citizen of the United States, residing at Barrington, in the county of Bristol .and State of Rhode Island, have invented new and useful Improvements in Metal-Tube- Extruding Machines, of which the following is a specification.

My invention relates to the manufacture of metal tubes by the extrusion process and consists in certain improvements I have made to the apparatus disclosed in my patentof April 13, 1909, No. 918,154. In the machine of said patent, the tubes extruded are shown as of relatively short length, say about four inches. In practice, however, I am able, with one operation of the plunger, to extrude tubes of considerably greater length, for example, three feet long, or more. These tubes have to be severed into shorter lengths for use and the present improvements, for which I solicit protection, consist of means for automatically severing the tubes into relatively short lengths immediately after they are extruded, whereby a great saving in time and labor results.

In the accompanying drawings, I have illustrated two forms of automatic tube severing mechanism, one of them being that which I use for tubes of relatively hard metal, such as copper, and the other being that which I use when tubes of soft metal, such as lead, are being made.

In the drawings, Figure 1 is a side elevation of a press equipped with one form of my automatic severing means, Fig. 2 is a front elevation on a larger scale of the severing means, Figs. 3 and 4 are perspective views of the other forTn ofsevering means, referred to above, and Fig. 5 is a vertical section through the extruding die.

The form of severing means shown in Figs. 1 and 2 is that used when lead tubes, or tubes of relatively soft metal are being made. The table of the press, containing the extruding die is indicated at 1, and the reciprocating plunger at 3, the same being driven from the crank shaft 4 on the end of which a sprocket wheel 5 is mounted. Beneath the table 1 tom orifice of the die, support 5, over or in front 15 passes as it is extruded. Thls support is provided with slots 6 at intervals, through which severing knives 7 are adapted to pass. These knives 7 are mounted on the vertical is placed a guide or and adjacent to the bot-,

of which thet'ube shaft 8, which is normally held by the spring 9 with its roller arm 10 against the face-cam 11, carried by a shaft 12; journalcd beneath the table and carrying on its other end the sprocket wheel 13, which has twice as many teeth as the sprocket wheel 4:, and is driven from the same by the chain 11. The said cam is so constructed that at the proper time it will .act on said roller arm to turn the shaft 8 and cause the knives 7 to pass through the slots 6 in the support or guide 5, severing the extruded tube 15 into as many lengths as required.

In the other form of severing means shown in Figs. 3 and 1, there is a similar cam 16 acting upon a shaft 17 provided with and carrying a roller normally held against the cam by the spring 18. Secured to said shaft are a series of arms 19, provided with semi-circular, tube-gripping jaws 20. Another parallel shaft 21, carries similar arms provided with cooperating semi-circular gripping-jaws 22, and is held against a stop 23 by the spring 2 1. Suitably journaled be-' tween said shafts 17 and 21, is a revoluble arbor 25, driven by a belt 26 from a countershaft 27, and carrying a plurality of circular saws 28. As the tube 30 comes from the dies, it passes circular jaws 22 on the shaft 21, and then the cam acts upon the shaft 17, carrying the complementary jaws 20, bringing them up to grip the tube between the two sets of jaws and then to carry the same against the rotating saws, severing it into as many lengths as desired. A step or abutment 29 is provided to stop the extruded tube in the proper position to be gripped and severed.

While I have illustrated both the forms of severing means as applied to a vertically acting press, it will be obvious that said means or similar means can be applied to horizontal or inclined presses. Where the tube extruded is of greater length than that mentioned, it is necessary or more convenient to use an inclined or substantially hori- 'zontal press. In the case ofthe lead tubes, they are held suspended in the die while being severed, as indicated in Fig. 2.

closely adjacent to the semi- I II? ving thus described my invention, what located beneath a plurality of severing devices against which the tube is carried by said means.

2. In a reciprocating plunger press for making metal tubes by extrusion, the combination with the plunger and die, of means or beyond the die to grasp the extruded tube and swing it laterally, a plurality of severing devices against which the tube is carried by said means, and mechanism driven in timed relation with the plunger to actuate said means. a

3. In a machine for making metal tubes, the combination with the dies, of a series of semi-circular jaws carried by an angularly movable shaft in position to receive the tube as it comes from the dies, a spring to normally hold said shaft and jaws in said position, a second shaft carrying cooperating jaws, a series of circular mounted between said shafts, a cam driven in timed relation with the die actuating means and arranged to act upon said second shaft to cause the jaws carried thereby to grip the tube between them and the complesaws revolubly' mentary jaws and then to" force the latter backand carry the tube against said saws.

4. In a machine for making metal tubes, the combination with the die and plunger, of a shaft mounted parallel with the axis of the die, half-jaws carried by said shaft in line with the die to receive the tube as it comes therefrom, a second parallel shaft carrying complementary half-jaws, a plurality of circular saws operatively -mounted between said shafts, a cam arranged to act on said second shaft to clamp the tube between said jaws and then to turn both shafts to carry the tube clamped in said jaws against said saws, and means to drive said cam in timed relation with said plunger.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

LESLIE E. HOOKER.

Witnesses:

HOWARD A. COOMBS, WILLIAM E. TUCKER. 

